Recent questions in d-and-f-Block Elements

Which of the following are the causes of Lanthanide contraction?

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One of the important use of ferrous sulphate is in the

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In acidic medium one mole of $MnO_4^-$ accepts how many moles of electrons in a redox process ?

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The property exhibited by only transitional elements

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In first transition series, the melting point of Mn is low because

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Vanadium (III) oxide is a strong

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In which of the following will the ionic radii of chromium be the smallest

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The transitional metal which form green compound in +3 oxidation state and yellow orange compound in +6 oxidation state is

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Least reactive metal is

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Which is most reactive metal

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Stainless steel does not rust because

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Lanthanoids are

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Which statement is true about the transitional elements

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The equivalent weight of potassium permanganate for acid solution is

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Which of the following is not true for transition metals.

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The highest oxidation state of will be

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Which of the following is the weakest reducing agent

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Which of the following forms interstitial compounds

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Transition metals are often paramagnetic owing to

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Variable valency is shown by

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Lanthanides and actinides resemble in

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Which forms coloured salts.

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Which occurs in nature in free state

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Which of the following statement is not correct.

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Which one of the following is reduced by hydrogen peroxide in acid medium

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Which one of the following is highest melting halide.

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The atomic numbers of the f-block elements are:

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Match the following:

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Consider the following statement, which of the following choices is correct?

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Match the following catalysts to the transition metal used.

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For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which odes not solidify before glass. The metal used can be?

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The standard reduction potentials (E $^{\circ}$ ) of the lanthanides for M $^{+3}$ (aq) + 3e $^{-} \overset{\Delta} \rightarrow$ M (s) all fall between –2.52 V (La) and –2.25 V (Lu). This helps explain which of the following properties of Lanthanides?

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Formation of interstitial compounds makes the transition metal more:

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Match the following, where EAN stands for Effective Atomic Number, the number of electrons on the central metal ion, including ligands in the bonding:

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Which of the following statements about magnetic properties is/are incorrect?

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If a transition-metal compound absorbs violet radiation of the visible region, its colour would be?

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What is the spin only magnetic moment value in Bohr magneton unit for $K_2Co(SCN)_4$ ?

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What is the spin only magnetic moment value in (Bohr Magneton units) of Cr(CO) $_6$ ?

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Which of the following ions is expected to be colourless - $Ti^{4+}, Cu^{2+}, V^{3+}$ and $Fe^{2+}$ ?

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The Atomic numbers of Mn, Fe and Co are 25, 26 and 27 respectively. The order of Magnetic moments among the following is

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The radius of (Atomic number of La = 57) is 1.06 A. Which one of the following given values will be closest to the radius of Lu $^{3+}$ ? Note: Atomic radius of Lu = 71.

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The electronic configuration of chromium in its ground state is

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Math the following Groups with respect to its electron configuration:

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What happens when a solution of potassium chromate is treated with excess dil. Nitric acid?

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In lanthanides the differentiating electron enters into

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For the given elements and their atomic numbers, which of these have the highest second ionization enthalpy?

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Arrange La $^{3+}$ , Pm $^{3+}$ , Yb $^{3+}$ and Ce $^{3+}$ in order of increasing ionic radii

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Which of the following ions has the maximum magnetic moment?

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Calculate the expected magnetic moment of a salt where Manganese is in the +II state?

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Rare earth elements are generally called as

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